City contractor is watching for pine tree disease
The City of Del Mar is on the lookout for a fungal disease that infects pine trees.
Residents also should watch out for pine pitch canker, which infects Torrey pines and other conifers.
Infected branches show honey-colored legions and discolored, dying needles.
In recent surveys, Del Marโs tree maintenance contractor has not detected pine pitch canker in City-owned trees in open spaces or right of way areas.
If detected, infected branches would be removed to prevent spreading the pathogen with practices that include cleaning saws and not moving firewood from the local area. Pruned areas would be treated with a phosphorous acid fungicide.
Many different insects can transmit the disease, which has infected trees in Torrey Pines State Reserve.
Removing infected branches can eliminate the disease, according to the University of Californiaโs Integrated Pest Management Program.
If privately-owned trees appear diseased, residents are advised to consult a certified arborist.
Open UC IPM webpage